Shell Programming and Scripting

Two things...

1) If I have an if statement that is true I want it to exit without running the rest of the file, but if it is false I want it to continue.. I just did

Code:

if [ $1 -eq 0 ]; then
exit
else
echo ""
fi

Can that work? I want it to exit if $1 is 0, and if not to continue running the rest of the script. Is it ok to have an exit command conditionally earlier on in the script?

2) If i want to have multiple if then fi statements in a shell script, can I just have several in the same script or is there something else that needs to be done? I have a few like the one above in the same script and seem to get unexpected end of file when I do that, why is this?

Thanks for your help!

1. you can exit early

2. you can nest if-then blocks

Code:

if  xxxxxxx
then
     if   yyyyyyyy
     then
          aaaaaaaaa
     else
          bbbbbbbbbb
     fi
fi

You can have a series of if then blocks:

Code:

if xxxxx
then
     aaaaaaaaa
fi 
if ddddddd
then
     ccccccc
else
     xxxxxxxxx
fi